Inner x Outer x Depth (mm): 30 x 41 / 44 x 7mm
Used on: Bottom Brackets (Using a BB30 crank on a BB86/92 Frame). Has a Flange around outer edge.
Inner Diameter x Outer Diameter x Depth: 30 x 41 / 44 x 7mm
Used on: Bottom Brackets (Using a BB30 crank on a BB86/92 Frame). Has a Flange around outer edge of 1mm
Precision Tolerance: ABEC3
Ball Roundness : Grade 10
Seals: LLB
Grease: Low friction, temperature stable grease
Material: 52100 High Carbon Chromium Alloy Races
Note: This listing is for single bearings, and not pairs.
Why Choose Enduro Bearings?
Unlike others, Enduro bearings are not just ‘off the shelf’ Industrial bearings. They are tailored specifically for the demands of cycling. Every aspect of an Enduro bearing is considered and spec’d to provide superior performance and value for each application. From the material of the races and the ball bearings, the types of seal and even the grease. Each of these has a profound effect of the performance and longevity of a bearing.
What is ABEC?
The ABEC grade of bearings is a set of standards for the manufacturing tolerances of bearings. There are five classes from largest to smallest tolerances: 1, 3, 5, 7, and 9. The higher ABEC classes provide better precision, efficiency and greater speed capabilities, but do not necessarily make the components spin faster. All quality manufacturers around the world manufacture to at least ABEC 1 standard. Enduro’s Minimum Standard is ABEC 3.
What is the meaning of Ball Grade?
Bearing balls are manufactured to a specific grade, which defines its geometric tolerances (or roundness). The smaller the number the higher the precision. A grade 20 ball for instance is 20/1,000,000" out of round. Enduro use Grade 10 for ABEC 3.
Grease
At Enduro they utilize several types of grease depending on the projected application of the bearing. They also fill both sides of the bearing for maximum lubrication, unlike industrial bearings which are only single filled. Wheel bearings (usually 2RS or LLB suffix) contain a low friction, temperature stable grease, whereas a Frame Pivot Bearings (MAX type) will contain a thicker waterproof marine type grease.
Seals
2RS: Literally means the bearing has Two Rubber Seals. There are many types of seals. On most other bearings 2RS means that the seal is made from rubber and has one sealing lip rubbing on any flat part of the inner race. Enduro’s seals are usually either LLU (usually the MAX type bearings) or LLB (better for hubs).
LLU Seals: Two NBR 70 rubber seals with medium/high contact seal, which rides in a matching groove machined into the bearing to make a labyrinth type seal. The outer sealing lip repels dirt and water while the inner sealing lip retains the grease.
LLB Seals: Two NBR 70 rubber seals with low contact seal, which rides in a matching groove machined into the bearing for low drag or friction.
Bearing Installation and Removal
Bearings should never be installed by pressing on the inner race. Always press on the outer race with a pilot bushing or similar tool, which will only make contact with the metal side of the outer race. A bearing press or similar should be used to exert the force needed to press the bearing into the housing. Ensure that the seating surface is clean and free from rough edges so that they fit true and square. Quite often bearings can feel fine before fitting, but then feel "notchy" or "rough" after fitting. This is almost always due to the bearings not sitting square and true. Care needs to be taken that the bearing is started straight and not at an angle to the housing.
Bearing Care
To prolong the life of your bearings, do not direct a high jet of water near areas of your bike where there bearings are located - an ingress of water can lead to premature bearing failure.
- Bearings
- mrf 30417 llb (enduro) bottom bracket bearing
DELIVERY
1.1 Where possible, we aim to despatch your goods within a "working day" of receiving your order. We will deliver goods ordered by you as soon as possible to the address you give us for delivery, within 30 days of your order except where we contact you to inform you of delays.
1.2 Where we inform you of delays, you will have the right to cancel your order or accept our revised projections for delivery.
1.3 We will inform you by email at the point when your goods are dispatched.
1.4 If the goods we deliver are not what you ordered or are damaged or defective or the delivery is of an incorrect quantity, we shall have no liability to you unless you notify us in writing, at our contact address, of the problem within 30 calendar days of the delivery of the goods in question.
1.5 If you do not receive goods ordered by you within 30 days of our notification of dispatch, we shall have no liability to you unless you notify us in writing at our contact address of the problem within 14 days of our maximum delivery period of 30 days from the date on which we informed you that we had dispatched the goods.
1.6 You will be required to sign for goods in most circumstances.
1.7 You are required to check goods immediately upon receipt to check for signs of delivery damage and, where you believe damage has occurred, you must mark the delivery driver's paperwork to indicate that the goods are "damaged" or, where the goods are substantially damaged, refuse delivery completely and contact us immediately on 01904 655063. It is very difficult for us to claim against our courier's insurance if you have signed to accept the goods.
Returns
2. RETURN OF GOODS
2.1 When you change your mind and cancel the contract to buy as in Clause 6, please note:
2.1.1 that you will return our goods to us at your own expense
2.1.2 that you will return any additional related goods that may have been joint offers or associated gifts to us at your own expense
2.1.3 that you will return our goods to arrive with us, within 14 days of your notice of cancellation. Please see Clause 7.2
2.1.4 that whilst you have our goods in your charge, you will take good and reasonable care of them to maintain them in a fully saleable condition
2.1.5 that you will not use or attempt to fit/assemble the goods aside from your need to assess them for suitability.
2.1.6 that wherever possible, all product packaging is returned with the goods
2.1.7 that you will repackage the goods appropriately to ensure that they are received in a satisfactory condition by us at our registered address.
2.1.8 that you are advised to use an insured and signed for delivery service when returning the goods as you remain liable for them until received in a satisfactory condition.
2.2 Where goods have not been received by us and no proof of posting supplied within 14 days of your notice of cancellation we will:
2.2.1 Contact you to arrange to have our goods collected at a mutually convenient time during the following 14 calendar days (Saturday and Sunday are not working days)
2.2.2 Advise you of the cost of collecting our goods
2.2.3 Deduct the cost of collecting goods from you from any refund we might owe you. Please see Clause 6.8
2.2.3 not be liable to refund you if goods are not received back and no proof of postage, clearly stating our details is made available.
2.3 The conditions of the contract to return goods take effect as soon as we receive your written notice of cancellation.
2.4 If you receive Damaged or Faulty goods OR we deliver incorrect or substituted goods where the substituted item(s) were not agreed to prior to despatch:
2.4.1 we will arrange collection of goods at OUR expense at a mutually convenient time OR
2.4.1 you may return goods to us, and we will refund the cost of you doing so, however please check with us first as it is often cheaper for us to collect.